Lamp structure.



C. MORU.

LAMP STRUCTURE.

APPLICATION TILED Patented Feb. 16, 1915.

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LAMP STRUCTURE APPLICATION FILED JUNE 5, 191L 1,128,893. I'atented'Feb.16,1915.

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' adjusted, and prevent lower portion of Fig.

UNITED STATES PATENT GFFICE.

CARL MORU, OF KENOSHA, VIISCONSIN, ASSIGNOR TO THE BADGER BRASS MFG. CO., OF

' KENOSHA, WISCONSIN, A COB/FORATIGN OF WISCONSIN.

LAMP STRUCTURE.

Specification of Letters Patent.

Patented Feb. 16, 1915.

To all whom it may concern:

Be it known that I, CARL Mono, a citizen of the United States, and a resident of Kenosha, in the county of Kenosha and State of Wisconsin, have invented certain new and useful Improvements in Lamp Structures, of which the following is a specification.

This invention relates to improvements in lamp structures and process of making same, and refers more particularly to an improved form of combined reflector and locking ring for holding the glazing in position, and to a new and useful manner of making same.

The process or method employed in the manufacture of the reflector and the locking ring forms the subject matter of another application, Serial No. 876,231, filed Decemher 9, 1914, which is a division of this, my original application. r

Among the salient objects of the invention are to provide a construction in which the paraFolic reflector, the glazing and the lampbody are locked together in assembled position by means of a single locking member; to provide a construction of the type described in which the locking member is positively prevented from becoming loose, due to vibration or other causes; to provide a construction in which the locking member itself forms an important element tending to improve the general ornamental appearance of the lamp; to provide, in a construction of the type referred to, a locking member which may be readily adjusted in position, which will positively lock the parts together when the ingress of dust or corrosive vapors; and an improved construction of the character referred to.

In the drawings, Figure 1 shows in elevation a small automobile headlight embodying my construction Fig. 2 is a section along the line 2--2 of Fig. 1; Fig. 3 is a tragmentary section of the ends of the locking ring and associated locking means; and Fig. 4 is a fragmentary enlarged View of the '2; Fig. 5 is a plan view showing the reflector and the locking ring during one of the initial stages oiimanutacture: Fig. 6 is a fragmentary section along the line (3 of Fig. 5; Fig. 7 is a fragmentary 'inclose the reflector 2.

- lamp-socket '7,

in general to provide I section of the reflector and locking ring at a later point in themanufacturing process;

Fig. 8 is an axial'section oi the. finished reflector bowl; and Fig. 9 is a plan view of the locking ring after the last forming operatron.

Referring to the outer shell of the lamp, is stamped or spun from a single piece of metal, and is so shaped as to completely To each side of the lamp is riveted a boss 3, which is provided with a vertical hole to fit one of the lamp forks. The outer edge of the shell 1 is rolled over to form a finishing bead 3 at the edge of the flaring portion of the lamp, and within the latter a. re formed the circumferential seat 4 for the reflector and the circumferential groove 5, within which is seated the drawings, 1 represents the locking ring 6. The parabolic reflector 2 is suitably orificed at the rear to admit the the lamp proper being indicated in dotted lines at 8, and the front edge of the reflector ispressed out to form a flanged portion 9 of the proper diameter to seat in the circumferential recess 4 of the outer shell. Fihellackcd or otherwise suitably cemented to the outer ed ge of the flange 9 of the reflector is an annular dust-gasket 10, against which the glazing 10 is forced by the action of the locking ring 6, and which seals the interior of the lamp against the ingress of dust particles.

Referring now to the specific construction of the locking means, it will be seen from'an inspection of Fig. 3 that one end of the looking ring 6 is expanded for a short distance from its end to provide a telescopic sheath portion ll, which laps over the other end 12 of the locking ring and is adapted to slide thereon when ring are forced apart. Circumferential movement of the fixed end 12 of the locking ring is prevented by a pin 13 which is engaged by the end of a block 14 which is soldered to the under side of the end 12 of the locking ring. To the outer shell of the lamp is riveted a hollow boX-like stamping 15, which forms a slide for the outer end of a wedging dog 16. The outer end of the latter is tapped to receive a locking screw 17, which passes through a small hole in the which, as shown,

two ends of the locking end of the slide-box and engages the i maming ng ring is then inserted by first placing the end 12 in the circumferential groove 6 of the outer shell in such a position that the block ll engages the pin 13. The reportion of the circumference of the locking ring is then worked into the slot, pressure being at the same time maintained in' a direction to hold the-block 14 against the pin 13,, and 'finally the free end good finish, and is of of the locking ring drops into the groove. It should be noted that, before the locking ring can be assembled, it is necessary to unscrew the catch member 18 to its fullest extent, so that it will not interfere with the member 19 to prevent the free end of the locking ring from entering the groove. When the locking ring is in place, it is then positively locked in position by screwing up the member 18 into the position shown in Fig. 3. To remove the ring, after loosening the screw 17 and forcing back the wedging dog 18, it is'necessary to insert the point of a knife or other instrument between the overlapping portion l1 of the locking ring and the outer shell. The locking ring 6 is formed of nickeled brass or other metal capable of taking a such width and shape as to form an ornamental trim around the glazing opening, harmonizing with the general shape of thelamp. The depth of the section is also such ring is forced tightly outward, due to the action of the wedging dog 16, the glazing and reflector are wedged tightly 7 and the construction is thereby rendered very secure and free from rattle or the posso I] sibility of vibration loosening up any of the parts.

The process of making the locking ring and reflector, WlllCll forms an important feature of my improved lamp construction,

Wlll now be described. Briefiv, the process consists in manufacturing the parabolic flector and then divided radially and formed as to itsfwo ends so as to provitl' an overlapping ring of the proper diameter.

the combined reflector end of the Wedging dog that when the locking,

in position;

1,1as,ses

Referring to Fig. 5, 21 represents a blank of brass or other suitable material after and locking ring have been formed tothe proper shape, before the trimming operation. This initial forming ordinarily consists of two or three punch-press operations with dies which are suitably graduated in shape, in order to prevent tearing of the metal. During these preliminary forming operations, the metal around the exterior of the circular formed portion of the blank must be held very securely against inward radial creeping movement due to the action of the dies, and in order to do this, it is necessary to provide'around the edges of the circular portion enough width of metal so that pressure may be applied to the exterior of the blank by means of suitable spring pads to prevent this creeping action. This always results in a great loss of material when making a reflector or similarly formed part. The making of thelocking ring as a single part would result naturally in a similar waste of material. It will thus be self-evident that by forming the reflector and the locking ring in a single piece, I eii'ect a saving in material equal to the size of a blank large enough to make the refiector alone, besides eflectingia considerable reduction in the number of forming operations. shown in Figs. 5 and 6, it is then subjected to a trimming operation, which removes the corners '22 and. also punches the hole 23 in the bottom of the reflector b owl. After the combined ring andbowl have thus been trimmed, it is sometimes necessary to perform an additional beading operation,-

which gives the required shape to the outer edge of the locking ring, as shown at 24 in Fig. 7. After the blankhas reached the shape shown in Fig. 7, the locking ring is After the blank attains the shape severed from the bowl by cutting the blank at 25, this operation usually being performed in a lathe by means of a narrow parting tool. This leaves the reflectorblank in its finished condition. as seen in Fig. 8. In order to enable the locking ring to occupy the-position which it doe's'occupy in the finished lamp structure, as shown in Figs. 2 and 4, it is necessary to effect a considerable reduction in its diameter, which is accomplished by cutting-the ring radially and removing a portion of its circumference. the ends being overlapped, as shown in Fig.9. so that the locking mechanism for the ends of the rinsz may be applied. Owing to this reduction in the diameter of the ring when it occupies its position in the lamp, the ring itself has a verv strong tendency and resume its ori inal diameter. sults in a very secure and sulstantial con.- struction, which is rendered to sprinn outwardly l tive by the locking means previously described.

l do not limit myself to the details of construction shown except. as specified in the appended claims.

I claim:

1. In a lamp, the combination of an outer r-i:p-sliapcil casing provided at its outer end with an inner annular glazing seat and an outer annular seat axially displaced with reference to said first seat. a glazing seated on said inner annular seat. a Sllt'tl metal ll ill-lj0fltlfill0llS locking ring adapted to cn gage said outer seal. and force the glazing into engagement with said lirst seat. means located wholly behind and conm-ahal by said ring for locking said ring in position.

In a lamp. the combination of an ow r casing provided at its outer end with an in nor annular scat and an outer annular s Bl, axially displaced with rrl ei'enrc to said lit seat. a glazing on said inner annular eal. resilient pressed slicrt metal noIH-ontinuow locking ring provided with overlappii ends and adapted to engage said outer i ll and 'l'orrc the glazing into cngagrment with said lirst seat. and mrai'is whollv behind. concealed by. and iil 'itlllll tl from the rear of said ring to positi ely expand said ring tangentially.

3. in a lamp. the c mbination of an outer oup-shaped casing provided at its outer end with an inner annular beat and an outer annular seat opposed to and axially displacml with reference to said first seat. a glazing on said inner annular seat. a pressed sheet metal nonwontinuous locking ring adapted to engage said outer seat and Force the glazing into engagement with said lirst seat. said casing bein; adapted t form a pocket bohind said ring. and means within said pocket operable from the exterior of the casing to expand said ring tangentially.

4. In a lamp. the con'ibinatimi of an outer bowl shaped casing provided at its open outer end with an inner annular outwardly facing seat and an outer annular inwardly facing seat opposed to and axially displaced with reference to said first seat. a parabolic reflector provided with an outwardlv projecting flange adapted to engage said inner seat. a glazing adapted to engage the outside ot' said flange. a pressed sheet metal non-continuous locking ring provided with overlapping ends and adapted to engage said outer seat and force the glazing toward said inner seat. said ring being provided with an inwardly projecting annular lip adapted to engage said glazing and torm an ornamental trim around the glazing, said ring. glazing, and casing forming a hollow annular pocket, and screw-operated means located behind, concealed and proteetwl bv said ring and Within said pocket, operable -glazing from behind said trim, for positively expanding said ring tangentially.

5. In a lamp, the combination of an outer casing, a glazing seated within said casing, a non-continuous locking ring for holding said glazing in position, the ends of said locking ring overlapping. and a screw-operated dog member for engaging one of the ends of said ring to lock the latter in position.

(3. In a lamp, the combination of an outer casing provided with a circumferential groove, a glazing seated Within said casing, a nmrcontinnous locking ring for holding said glazing in position and seated Within said groove, the ends of the locking ring overlapping, means for preventing circumterential movement of one of the ends of said locking ring. and a screw for holding apart the two ends of said ring and locking it in position.

7. In a lamp, the combinapon of an outer bowl-shaped casing providen with an annula r seat, a glazing on said seat, a non-continnous sheet metal locking ring adapted to hold said glazing in position and to form an ornamental trim around the gilazing opening.

and provided with means wh reby the opening between the ends of the ring remains sealed when said ends are moved apart, and screw-o ierated means for forcing apartthe ends of: said ring in a. tangential direction.

8. In a lamp. the combination of an outer cas ng, a glazing seated within said casing, a. non-continuous locking ring for holding said glazing in position; said locking ring being provided with overlapping ends, and means for locking the overlying end in position.

9. In a lamp. the combination of an outer casing, a glazing seated within said casing, a non-continuous locking ring for holding said glazing in position, said locking ring being provided with overlapping ends. and means for locking the overlying end of said ring in engagement with the end beneath.

10. In a lamp, the combination of an outer cup-shaped casing provided at its open outer end with an inner annular seat and an outer annular opposed scat axially displaced with reference to said first seat. a parabolic reflector provided with a circumferential flange adapted to engage said inner seat, a non-continuous locking ring adapted to engage said outcr seat and force the reflector flange into engagement with said first seat, a interposed between said ring and said flange. and positive means for locking said ring in position, said means including means for positively positioning one of the ends of said ring. and means carried by the casing for clamping the other end of said ring.

ll. Tn a lamp. the combination of an outer lanvlshapcd casing provided with an inner izo annular outwardly facing seat and an outer inwardly facing locking ring seat axially displaced with reference to said first seat, a parabolic reflector nested within said outer easing and provided with an outwardly projeeting annular flange adapted to engage said inner seat, a glazing adapted to engage said flange and close the end of the reflector, a pressed sheet metal annular locking ring provided with an outer curved portion adapted to engage said outer seat and with an inner inwardly projecting annular lip adapted to engage the outer face of the glazing and force the latter toward the inner seat, said locking ring forming an ornamental trim around the glazing, said ring, glazing, and outer casing forming a substantially Weatherproof annular cavity, means Within said cavity adapted to engage each end of said ring and resist relative movement thereof toward each other, and a screw operating on said means and adapted to cause relative movement away from each other in a tangential direction.

12. In a lamp, the combination of an open ended outer casing, a glazing seated Within said casing and adapted to close the end thereof, a non-continuous locking ring for holding said glazin in position, means for positioning one of t 1e ends of said locking ring against movement toward the other end of said ring, and independent means for locking the other end of said ring in posi tion.

13. .ln a lamp, the combination of an openended outer casing, a glazing seated within said casing and adapted to close the end thereof, a non-continuous locking ring for holding said glazing in position, stationary means for positioning one of the ends of said ring, and adjustable means for holding a the other end of said ring in position.

H. In a lamp, the combination of an outer casing, a glazing seated within said casing, a non-continuous locking ring for holding said glazing in position, a stationary member adapted to engage one of the ends of said ring to prevent movement of the latter, and screw-operated means engaging the other end of said ring.

CARL MORU. W'itnesses:

" H. C. HAGMANN, J. W. SCHMITT. 

